Doctors from London University have revealed details of what they believe is the largest amount of ecstasy ever consumed by a single person. Consultants from the addiction centre at St George's Medical School, London, have published a case report of a British man estimated to have taken around 40,000 pills of MDMA, the active ingredient in ecstasy, over nine years. The heaviest previous lifetime intake on record is 2,000 pills. Though the man, who is now 37, stopped taking the drug seven years ago, he still suffers from severe physical and mental health side-effects, including extreme memory problems, paranoia, hallucinations and depression. He also suffers from painful muscle rigidity around his neck and jaw which often prevents him from opening his mouth. The doctors believe many of these symptoms may be permanent.